Television – Panoramic – With observer selected field of view
Patent
1997-04-04
1999-11-23
Rao, Anand S.
Television
Panoramic
With observer selected field of view
348139, 348 42, 348135, 348 36, H04N 718
Patent
active
059909358
ABSTRACT:
A method and apparatus for performing a lens calibration procedure which is executed for each camera and lens pair. The calibration procedure is performed to determine the camera and lens nodal point offset and field of view, plus image offset in both the horizontal and vertical directions as a function of lens zoom and focus settings. The method includes the step of providing apparatus which enables the semi-automatic and rapid entry of data points representing lens zoom and focus setting information, thereby eliminating a source of human error. The general method includes the steps of creating a real environment and an identical virtual environment which is a copy of the real environment. The image from the virtual environment is superimposed on a monitor displaying the real environment. The camera's zoom and focus rings are incremented through a plurality of values by discrete steps. For each value, the virtual environment's settings are manipulated until the real and virtual images are identical. The values from the virtual environment are then recorded as a data point corresponding to a specific camera lens zoom and focus setting. A plurality of data points are then recorded to create the calibration dataset.
REFERENCES:
patent: 5285397 (1994-02-01), Heier et al.
patent: 5495576 (1996-02-01), Ritchey
Evans & Sutherland Computer Corporation
Rao Anand S.
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